RU1784052C - Device for selection and feeding of weft yarn to lay of high-speed loom - Google Patents

Abstract

SUMMARY OF THE INVENTION: A weft yarn selection mechanism is formed by a set of clamps, each of which is provided with an iron core. The clamps, covering the free end of the elements of choice, interact with the transverse lifting beam. 4 ill.

Description

The invention relates to weaving.

Figure 1 shows a loom, a partial perspective view of the left side, with a weft selection and feeding device; figure 2 - the proposed device, side view, in section; in Fig.3 is the same, the time of selection and filing of the weft thread; figure 4 is the same at the end of the selection.

Fixed spools 1 are mounted on the loom, from where the weft yarn 2 is pulled together, which, passing through the eyes 3 of the feed levers 4, 41,... 4 of the weft selection and feeding device 5, remains braided in the side edge 6 of the fabric 7. The weft yarn 21 is fed by lowering the corresponding lever 4 (see FIG. 1) opposite the weft insertion device 8, is gripped by the latter and pulled during the movement of the weft laying device onto the yoke 9 of the loom in the nailing direction 10, is inserted into the open throat. formed by threads mi

warp 11 and 12, after which it is picked up by a reed 13 against the edge 14 of fabric 7.

The weft yarn selection and feeding device 5, mounted on the loom 15 of the loom, on its left side, has a housing 16 with an inwardly protruding portion 17 that forms a stop for a set of drive levers 18, 18 ... 18 (shown in FIG. 3 only two of these levers). The levers 18, 18 ... 18 are suspended on a rotary shaft 19, mounted in the housing 16, respectively, are pressed to the protruding sections 17 by means of springs 20. 20 ... 20vi (only the first spring is shown) and are suspended by rotation axes 21.21 | ... 2Г11 levers 4, 4I ... 4V, which are guided in motion by a guide box 22, which is firmly attached to the housing 16.

On the drive levers 18 ... 18V, the selection elements 24, 24 ... 24 are also suspended by means of the axes 23. The latter are affected downward by the springs 25. fixed between one end of that

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the same selection element and anchor 26 on the corresponding drive lever. Each drive lever has a shoulder 27, 27 ... 27, which serves to interact with the swinging transverse beam 28, supported by a 1-lever 29, which, being suspended at a point 30, is constantly held by the spring 31 in contact with the cam 32 driven by the drive a shaft 33, which also drives a weaving machine 34 (see FIG. 1).

At the free end 35 of each selection element 24, respectively, a collar 36, 36 ... 36V is put on with a slide, which, guided by a block 37 and provided with an iron core 38 ... 38 suspended on it, interacts with an additional transverse lifting beam 39, provided at the end of another lever 40, suspended at a point 41 and held by a spring 42 against a second cam 43, which is integral with the drive shaft 33, as well as with a permanent magnet, respectively 44,44 ... 44V, equipped with a winding 45, which can be closed on its own Chiva-governmental obezmagni- circuit 46 via a switch 47 controlled by the electronic programmer (not shown).

The device operates as follows.

At the beginning of the selection cycle, all the switches 47 are open and all the clamps 36 ... 36, raised by the transverse lifting arm 39 due to the action of the cam 43, are magnetically suspended by their iron rods 38, 38 .., 38V from the corresponding permanent magnets 44. .. 44V and, therefore, hold the corresponding selection elements 24 ... 24V outside the range of oscillation of the swinging transverse rocker 28, as shown in FIG.

When, for example, lever 4 is to be selected, the electronic programmer closes the corresponding switch 47, which, by magnetizing the magnet 44, releases the clamp 36. The latter, thanks to the spring 25, moves downward along with the corresponding selection element 24, which thus enters the range of operation of the transverse rocker arm 28. As a result of the swing indicated by dashed lines in FIG. 3, to the position indicated by solid lines and indicated by 48, the same 24-way select element shifts to the right m influence 1 on his shoulder 27, causing, thus, the rotation of the drive

the lever 18 in a clockwise direction and lowering the lever 4 (see Fig. 3).

After that, the final stage of the selection cycle is completed; Due to the action of the cam 32 and the spring 31, the transverse beam 28 is returned back together with levers 18 and 4 due to the action of the spring 20, after which the selection element 24 and the corresponding clamp 36 are lifted by the transverse lifting beam 39 c. as a result of the action of the cam 43 (see FIG. 4) and the switch 47 opens, i.e. the initial conditions shown in FIG. 2 are restored.

The armature 38.38 ... 38VII of the clamps 36.36 ... 36VI1 can be magnetic, and the permanent magnets 44, 44 ... 44V can be electromagnets, the power supply circuits 46 of which are used to create a magnetic field with polarity opposite the polarity of these magnetic cores.

Claims (1)

The claims A device for selecting and feeding the weft yarn to the spacer of a high speed loom, comprising: a set of feed levers; one ends of which have eyes for the weft yarn and the other ends are fixed on the corresponding drive levers mounted with the possibility of swinging by means of a selection element mounted on each of them, which is able to interact with the drive in the form of a rocker rocker, and each element has the ability to interact with a selection mechanism and spring-loaded away from the latter, and means for simultaneously raising the selection elements in each selection cycle to the selection mechanism, In general, in order to increase the reliability of operation at high speeds, the selection mechanism is made in the form of, according to the number of selection elements of clamps, each of which has an iron ring and covers the corresponding selection element with the possibility of sliding the selection element by the clamp, and by the number of permanent magnet clamps with an electromagnetic coil, each clamp has the ability to interact with the corresponding magnet with sticking on it, and the means for simultaneously raising the selection elements is made in in the form of a rocker mounted with the possibility of swinging, bearing a transverse bar for interacting with the clamps, the measles of the clamps being able to detach from the magnets while passing an electric current through the magnet winding to reduce the magnetic field to zero. fs / g / tN ID O H CD f3 bn b ti itS 45 #: #;  // 7 21 W % 2J Fig.Z Vf si